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Next generation radioactive ion beam facilities are being planned and
built across the globe, and with them an incredible new array of exotic
isotopes will be available for study. To keep pace with the state of
nuclear physics research, both new detector systems and new target
systems are needed. The Jet Experiments in Nuclear Structure and
Astrophysics (JENSA) gas jet target is one of these new target systems,
designed to provide a target of light gas that is localized, dense, and
pure. The JENSA system involves nearly two dozen pumps, a custom-built
industrial compressor, and vacuum chambers designed to incorporate
large arrays of both charged-particle and gamma-ray detectors. The
JENSA gas jet target was originally constructed at Oak Ridge National
Laboratory for testing and characterization, and has now moved to the ReA3
reaccelerated beam hall at the National Superconducting Cyclotron
Laboratory (NSCL) at Michigan State University for use with radioactive beams. JENSA will form the main
target for the SEparator for CApture Reactions (SECAR) at the Facility for Rare Isotope Beams (FRIB), and
together the two comprise the focus of the low energy experimental
nuclear astrophysics community in the United States. Our recommendation from the FRIB Scientific Advisory Committee can be found below.

Funding for the Jet Experiments in Nuclear Structure and Astrophysics Gas Jet Target provided by the US Department of Energy (Office of Nuclear Physics), National Science Foundation, JINA, and the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy.